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Photocurable maskant composition and method of use

a maskant and composition technology, applied in the direction of diffusion coating, instruments, photosensitive materials, etc., can solve the problems of reducing the throughput of metal components, requiring a substantial period of time to solidify, and a solvent-based maskant film typically requires a substantial period of tim

Active Publication Date: 2010-07-27
RTX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after being applied to a metal component, a solvent-based maskant film typically requires a substantial period of time to solidify (e.g., 30 minutes to 24 hours) before the diffusion coating process can commence.
This delay in the formation of the maskant film substantially reduces the throughput of metal components.

Method used

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  • Photocurable maskant composition and method of use
  • Photocurable maskant composition and method of use
  • Photocurable maskant composition and method of use

Examples

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Embodiment Construction

[0007]FIG. 1 is a flow diagram of method 10 for diffusion coating a metal component with the use of a photocurable maskant composition. As shown, method 10 includes steps 12-18, and initially involves applying the maskant composition onto the metal component (step 12). The maskant composition functions as maskant film that prevents diffusion coatings from being formed on one or more portions of the metal component. Accordingly, the maskant composition is desirably applied over the portions of the metal component that are intended to remain uncoated after the diffusion coating process.

[0008]The maskant composition includes a cross-linkable resin, a photoinitiator, and a gettering agent, where the gettering agent is desirably provided in a sufficient quantity to mask an underlying surface of the metal component. The concentration of the gettering agent is also proportional to the viscosity of the maskant composition. As a result, the technique used to apply the maskant composition to ...

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Abstract

A maskant composition and a method of diffusion coating a metal component with the use of the maskant composition, where the maskant composition comprises a cross-linkable resin, a photoinitiator, and a gettering agent.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to diffusion coating processes. In particular, the present invention relates to maskant films used to mask underlying metal components during diffusion coating processes.[0002]Diffusion coating processes, such as diffusion aluminide coating processes, are used to apply protective coatings over metal components in a variety of industries. For example, turbine engine components are typically diffusion coated with aluminum-based alloys to form aluminide coatings, where the aluminide coatings protect the underlying engine components from oxidation and other environmental elements. During a diffusion coating process, it is desirable to selectively coat portions of a metal component, while allowing other portions to remain uncoated. One technique for selectively coating a metal component involves the use of a maskant film, which is applied over a desired location. After the maskant is applied, the diffusion coating process is ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08J7/04G03C1/00C08K3/08
CPCC08K5/0025C23C8/04C23C10/04
Inventor MINOR, MICHAEL J.HUXOL, JASON E.
Owner RTX CORP